// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/playback/skip_image_canvas.h"

#include "third_party/skia/include/core/SkShader.h"

namespace cc {

SkipImageCanvas::SkipImageCanvas(SkCanvas* canvas)
    : SkPaintFilterCanvas(canvas)
{
}

bool SkipImageCanvas::onFilter(SkTCopyOnFirstWrite<SkPaint>* paint,
    Type type) const
{
    if (type == kBitmap_Type)
        return false;

    SkShader* shader = (*paint) ? (*paint)->getShader() : nullptr;
    return !shader || !shader->isAImage();
}

void SkipImageCanvas::onDrawPicture(const SkPicture* picture,
    const SkMatrix* matrix,
    const SkPaint* paint)
{
    SkTCopyOnFirstWrite<SkPaint> filteredPaint(paint);

    // To filter nested draws, we must unfurl pictures at this stage.
    if (onFilter(&filteredPaint, kPicture_Type))
        SkCanvas::onDrawPicture(picture, matrix, filteredPaint);
}

} // namespace cc
